MIPS: Port count-based profiler

Port r11120 (548ba49bd).

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9835083
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11141 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/deoptimizer-mips.cc

@@ -119,7 +119,7 @@ void Deoptimizer::PatchStackCheckCodeAt(Code* unoptimized_code,
   const int kInstrSize = Assembler::kInstrSize;
   // This structure comes from FullCodeGenerator::EmitStackCheck.
   // The call of the stack guard check has the following form:
-  // sltu at, sp, t0
+  // sltu at, sp, t0 / slt at, a3, zero_reg (in case of count based interrupts)
   // beq at, zero_reg, ok
   // lui t9, <stack guard address> upper
   // ori t9, <stack guard address> lower
@@ -167,7 +167,11 @@ void Deoptimizer::RevertStackCheckCodeAt(Code* unoptimized_code,
 
   // Restore the sltu instruction so beq can be taken again.
   CodePatcher patcher(pc_after - 6 * kInstrSize, 1);
+  if (FLAG_count_based_interrupts) {
+    patcher.masm()->slt(at, a3, zero_reg);
+  } else {
     patcher.masm()->sltu(at, sp, t0);
+  }
 
   // Replace the on-stack replacement address in the load-immediate (lui/ori
   // pair) with the entry address of the normal stack-check code.

src/runtime-profiler.cc

@@ -175,7 +175,9 @@ void RuntimeProfiler::AttemptOnStackReplacement(JSFunction* function) {
   // prepared to generate it, but we don't expect to have to.
   bool found_code = false;
   Code* stack_check_code = NULL;
-#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_ARM)
+#if defined(V8_TARGET_ARCH_IA32) || \
+    defined(V8_TARGET_ARCH_ARM) || \
+    defined(V8_TARGET_ARCH_MIPS)
   if (FLAG_count_based_interrupts) {
     InterruptStub interrupt_stub;
     found_code = interrupt_stub.FindCodeInCache(&stack_check_code);
@@ -351,7 +353,9 @@ void RuntimeProfiler::OptimizeNow() {
 
 
 void RuntimeProfiler::NotifyTick() {
-#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_ARM)
+#if defined(V8_TARGET_ARCH_IA32) || \
+    defined(V8_TARGET_ARCH_ARM) || \
+    defined(V8_TARGET_ARCH_MIPS)
   if (FLAG_count_based_interrupts) return;
 #endif
   isolate_->stack_guard()->RequestRuntimeProfilerTick();

src/runtime.cc

@@ -8358,7 +8358,9 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) {
     PrintF("]\n");
   }
   Handle<Code> check_code;
-#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_ARM)
+#if defined(V8_TARGET_ARCH_IA32) || \
+    defined(V8_TARGET_ARCH_ARM) || \
+    defined(V8_TARGET_ARCH_MIPS)
   if (FLAG_count_based_interrupts) {
     InterruptStub interrupt_stub;
     check_code = interrupt_stub.GetCode();